Steam-boiler.



No. 809,503. l PATBNTED JAN. 9, 1906.

o. W. HAWKBS.

STEAM BDILER.

ArrLroATIoN FILED 111111.21, 1906.

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No. 809,503. PATENTED JAN. 9, 1906.`

U. W.`HAWKES.

STEAM BOILER.

APPLICATION FILBD AUG. 21, 1905.

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mxumm/ y n. ela-@WW www PATENT OFIICEar CHARLES WILLIAM HAVVKES, OF CHICAGO, ILLINOIS.-

STEAM-BOILER.

Specification of Letters Patent.

Patented J' an. 9, 1906.-

v Application iiled August 21. 1905. Serial No. 275,043.

To all whom it may concern:

Be it known that I, lCHARLEs WILLIAM HAwKEs, a citizen of the United States, residing at Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements in Steam-Boilers, of which the followin is a full, clear, and exact description, re erence being had to the accom panying drawings, forming a part hereof. v

My invention has relation to improvements in combined iire-tube and water-tube boilers; and it consists in the novel construction and arrangement of parts more fully set forth in the specification, and pointed out in the claims. f

In the drawings, Figure 1 is a longitudinal middle vertical section of the boiler and furnace on the line 1 1 of Fig. 2. Fig. 2 is a half-section and elevation of the front of the boiler. Fig. 3 is a half-section and elevation of the rear of the boiler. Fig. 4 is a sectional detail showing construction and manner of drawing the flushlug to its seat. Fig. 5 Iis a rear view of the p ug. Fig.- 6 is a front view of the plug. Fig. 7 is a sectional detail on line 7 '7 of Fig. 1, showing the construction of the brick-tile for ncasing the lower watertubes. Fig. 8 is a similar section of a modified construction of tile, and Fig. 9 is a sectional. detail showing a :modification of a mud-drum attached to the rear water-leg.

The object of my invention is to construct a combined fire-tube and water-tube boiler which shall utilize to the best advantage the heat units of the combustion roducts, one which shall insure a well-denne and positive circulation of the water in the boiler, one which shall insure an even distribution of the combustion products among the surfaces to be heated, one which will insure against a toc rapid deterioration of the parts exposed to the combustion products, one in which certain portions of the boiler shall be protected against direct contact with the combustion products, one in which the combustion products are directed to and caused to escape from the rear of the boiler, one which will permit Aof ready` repair, one in vwhich no rivetheads are exposed to the direct action of the combustion products, thereby minimizing the danger of leakage, one into whose construction any available material may enter, such as boiler-plate proper or steel castings, one whose furnace. consumes the bulk of the smoke, and one possessing further and other description of the invention, which is as follows:

Referring to the drawings, G represents the grate; F, the fire-box; B, the bridgewall 5 C, the main or lower combustion-chamber of the furnace, and C the upper or supplemental combustion-chamber.

The boiler in the present instance is composed of three distinct members or sectionsviz., the upper fire-tube section a, composed of a shell traversed lengthwise by a series of fire-tubes; the lower water-tube section b,

composed of a series of water-tubes, and the intermediate section constituting the upper water-tube section c, likewise composed of a series of water-tubes. The water-tube sections are disposed substantially parallel to one another and at an incline to the fire-tube section which surmounts them, the inclination being upward and forward, so as to insure effective contact with the products of combustion passing from the fire-box. Depending from the rear endV of the section a and passing half-way around the periphery of the shell of said section a is a water-leg 1, which establishes communication with the lower rear ends of the water-tube sections b c. Encompassing the lower peripheral half of the shell of the section a and depending slightly below said section is the front water-saddle 2, which establishes communication with the front end of the water-tube section c. The lower water-tube section b is extended forward and beyond the front end of the section a and taps the water-tube header 3, which, as shown, is mounted on rollers 4 to allow for the necessary expansion and contraction. From the top of the header 3 leada series of curved circulating-tubes 5, the upper ends thereof tapping the shell of the section 'a and the front wall of the saddle 2 in a plane slightly above the upper ends of the tubes of the section c.

Extending rearwardly to a suitable Vpoint beyond the bridge-wall and suspended between the series of tubes constituting the lower section b are special fire-tiles 6, which collectively incase the several tubes and form a partition-wall, which not only serves to protect the tubes against direct contact with the combustion products, but to deflect said products rearwardly beyond the bridgewall, where they are free to ascend between the tubes b to a point above. The space be- IOO tween the iire-tiles and tubes is preferably advantages better apparent from a detailed packed with a layer of iire-clay m. The upper water-tube section c is covered with split fire-brick or equivalent material 7, preferably protected with a layer of non-conducting material 8, such asasbestos, magnesia, and the like. This coverin of brickr7 constitutes a wall or partition w `ch conjointly with the partition '6 forms a flue or conduit 9 for the products of combustion, the latter, as shown by the feathered arrows, passing forward and upward to the front of the furnace and rearwardly through the fire-tubes of the section a, finally entering the smoke-box or exit-flue 10, which in the present instance is at the rear end of the boiler. It may be desirable in some instances and under certain conditions to admit a portion of the gases and combustion products directly into the conduit 9 before they have passed beyond the partition 6, in which case I may perforate the bricks forming said partition, as shown in the modiiication in Fig. 8, where 6 represents the brick, and p a passage therethrough. Again, in the forms shown in the drawings the brick entirely incases the tubes; but While such total incasing of said tubes is perhaps desirable and in the majority of cases essential it is not absolutely necessary, and the brick maybe so formed as to protect only the lower halves or portions of the peripheral surfaces' of the tubes against the direct impact of the gases and combustion products.

The front wall of the water-saddle 2 is provided opposite the ends of the tubes c with openings closed by the flush-plugs 11, the openings permitting the rolling 7 or expanding of the ends of the tubes against the wall of the saddle which supports them. The flush-plugs are readily installed into position through the terminal hand-holes of the saddle, which are closed by plugs 12 of ordinary construction. Each flush plug 11 is provided with a socket 13, whose face wall is provided with a T-shaped opening 14. Throu h the wide portion of this opening is passed t e head of a T-bolt 15, after which the bolt is shifted to bring its stem into the narrow portion of the opening, the head by this time passing behind the wall of the plug, which serves as an abutment. Then with a crab or washer 16 inserted between the nut 17 of the bolt and the wall of the saddle the plug can" be drawn up to a bearing by screwing the nut Y The feed-pipe is represented by 18, and the dry pipe by 19. The clean-out is shown at 20. Such other conventional portions as may be shown in the drawings, but to which no reference is made, are well understood in the art and require no special reference here, as they form no part of my present invention. Where necessary a mud-drum 21 may be attached to the bottom of the rear water-leg, as shown in the modication in Fig. 9. The supplemental combustion-chamber C (that immediately in front of the boiler-section a) is preferably formed of a sheet-steel casing lined with nre-brick and jacketed with asbestos, as shown.

. The disposition of the several parts of the boiler as shown is conducive to a perfect water-circulation, the path of such circulation being indicated by the plain arrows in Fig. 1. The current from the tubes 5 serves to induce circulation from the saddle 2, and that from the saddle in turn induces circulation in the tubes 5, so that the two currents mutually assist one another, the combined currents thence passing rearwardly through the section u, thence downwardly through the rear water-leg 1, thence upwardly through the sections b c, as shown.

Having described my invention, what I claimisv 1. A boiler comprising a series of superposed water-tube sections, a fire-tube section surmounting the same, a water-leg connecting one end of the respective water-tube sections with the adjacent end of the fire-tube section, and independent means for connecti the opposite ends of the res ective watertlilihe sections with the fire tu e section, the space between the water-tube sections communicating with the fire-tube section at the IOO end opposite to the Water-leg, substantially as set forth.

2. A boiler comprising a series of superposed water-tube sections, a iire-tube section surmounting the same, a water-leg connecting one end of the respective water-tube sections with the adjacent end of the fire-tube section, a smoke box or iiue leading from the fire-- tube section at the end adjacent to said waterleg, and independent means for connecting the opposite ends of the respective water- `tube sections with the adjacent end of the.

tions, a water-saddle communicatin with the front end of the shell of the fire-tu e section and with the front end of the upper watertube section, a header communicating with the front end of the lower water-tube section, and a series of circulating-pipes establishing communication between said header and the shell and saddle of the firetube section respectively, substantially as set forth.

4. A boiler comprising two superposed watertube sections, a fire-tube section surmounting the same, a water-leg depending from the rear end of the fire-tube section and establishing communication between said section and the adjacent ends of the watertube sections, a water saddle establishing communication between the front of the firetube section and the u per water-tube section, a header into whic the front end of the lower water-tube section leads, circulatingtubes establishing communication between the header and the saddle and the front of the fire-tube section respectively, a artitionwall formed in connection with the ower water-tube section and extending a suitable distance rearwardly, a partition-wall formed in connection with the upper water-tube section for substantially the full length of the latter, anda smoke box or flue leading from the rear of the fire-tube section, substantially as set forth.

5. In a boiler, an upper lire-tube section, a lower water-tube section, an intermediate water-tube section, a rear water-leg depending from the fire-tube section and establishing communication with the rear ends of the water tube sections, the latter being disposed in substantially parallel planes and inclining forward and upward toward the retube section, a front water-saddle establishing communication between the iretube section and the intermediate or upper watercase in the Patent Oce.

[SEAL] Correction in Letters Patent No. 809,503.

tube section, the lower water-tube section extending forwardly beyond the front of the fire-tube section, a header at the front upper end of the lower water-tube section, and a series of circulating-pipes connecting the header with the fire-tube section and tapping the latter at a point or plane above the upper end of the intermediate or u per water-tube section, substantially as set fldrth.

6. In combination with a boiler-furnace having a fire-box and bridge-wall, a boiler comprising a lower watertube section, an upper water-tube section, a fire-tube section surmounting the aforesaid sections, means for establishing communication between the several sections, a partition-wall formed in connection with the lower water-tube section and extending a suitable distance rearwardly beyond the bridUe-wall, a partition formed in connection wili the upper water-tube section whereby a conduit is formed between said partitions for the passage of the combustion products, said conduit communicating withone end of the lire-tube section, substantially as set forth.

7. In a boiler, an upper fire-tube section, a lower water-tube section, an intermediate or up er water-tube section spaced therefrom and orming a conduit therewith, a smokebox at the rear end of the fire-tube section, means for directing the combustion products rearwardly along the base of the lower watertube section, thence forwardly through said conduit into the front end of the fire-tube section, thence rearwardly through the firetube section into the smoke-box, substantially as set forth.

In testimony whereof I aiX my signature in presence of two witnesses.

CHARLES WILLIAM HAWKES. Witnesses:

HARRY MEDIN, GEO. H. HEAFFORD.

It is hereby certied that the name of the patentee in Letters Patent No. 809,503,

granted January 9, 1906, for an improvement in Steam-Boilers, was erroneously Written and printed Charles William Hawkes, Whereas the said name should have been written and printed Charles Williams Hawkes; and that said Letters Patent should be read with this correction therein that the saine may conform to the record of the Signed and sealed this 3d day of April, A. D., 1906.

F. I. ALLEN,

Commissioner of Patents.

tions, a water-saddle communicatin with the front end of the shell of the fire-tu e section and with the front end of the upper watertube section, a header communicating with the front end of the lower water-tube section, and a series of circulating-pipes establishing communication between said header and the shell and saddle of the firetube section respectively, substantially as set forth.

4. A boiler comprising two superposed watertube sections, a fire-tube section surmounting the same, a water-leg depending from the rear end of the fire-tube section and establishing communication between said section and the adjacent ends of the watertube sections, a water saddle establishing communication between the front of the firetube section and the u per water-tube section, a header into whic the front end of the lower water-tube section leads, circulatingtubes establishing communication between the header and the saddle and the front of the fire-tube section respectively, a artitionwall formed in connection with the ower water-tube section and extending a suitable distance rearwardly, a partition-wall formed in connection with the upper water-tube section for substantially the full length of the latter, anda smoke box or flue leading from the rear of the fire-tube section, substantially as set forth.

5. In a boiler, an upper lire-tube section, a lower water-tube section, an intermediate water-tube section, a rear water-leg depending from the fire-tube section and establishing communication with the rear ends of the water tube sections, the latter being disposed in substantially parallel planes and inclining forward and upward toward the retube section, a front water-saddle establishing communication between the iretube section and the intermediate or upper watercase in the Patent Oce.

[SEAL] Correction in Letters Patent No. 809,503.

tube section, the lower water-tube section extending forwardly beyond the front of the fire-tube section, a header at the front upper end of the lower water-tube section, and a series of circulating-pipes connecting the header with the fire-tube section and tapping the latter at a point or plane above the upper end of the intermediate or u per water-tube section, substantially as set fldrth.

6. In combination with a boiler-furnace having a fire-box and bridge-wall, a boiler comprising a lower watertube section, an upper water-tube section, a fire-tube section surmounting the aforesaid sections, means for establishing communication between the several sections, a partition-wall formed in connection with the lower water-tube section and extending a suitable distance rearwardly beyond the bridUe-wall, a partition formed in connection wili the upper water-tube section whereby a conduit is formed between said partitions for the passage of the combustion products, said conduit communicating withone end of the lire-tube section, substantially as set forth.

7. In a boiler, an upper fire-tube section, a lower water-tube section, an intermediate or up er water-tube section spaced therefrom and orming a conduit therewith, a smokebox at the rear end of the fire-tube section, means for directing the combustion products rearwardly along the base of the lower watertube section, thence forwardly through said conduit into the front end of the fire-tube section, thence rearwardly through the firetube section into the smoke-box, substantially as set forth.

In testimony whereof I aiX my signature in presence of two witnesses.

CHARLES WILLIAM HAWKES. Witnesses:

HARRY MEDIN, GEO. H. HEAFFORD.

It is hereby certied that the name of the patentee in Letters Patent No. 809,503,

granted January 9, 1906, for an improvement in Steam-Boilers, was erroneously Written and printed Charles William Hawkes, Whereas the said name should have been written and printed Charles Williams Hawkes; and that said Letters Patent should be read with this correction therein that the saine may conform to the record of the Signed and sealed this 3d day of April, A. D., 1906.

F. I. ALLEN,

Commissioner of Patents.

It is hereby certified that the name of the patentes in Letters Patent No4 $419,503, grunted January 9, 1906, for an improvement in Steatnl-lluilers." was, erronvously Written and printed Charles William Hawkes, whereas the said mimo should have been written and printed Charles Williams Hawkes; and that said Letters Patent Ahould he read with this correction therein that the Saum muy rrmfnrm to the rettori] nl" the Case in the Patent Office.

Signed and sealed this 3d day of April, A. D.. hlm;

[SEAL] l-`. I. ALLEN.

i E o (VOUUIIIIASI-UNFT (if IMKNS.

Correction in Letters Patent No. 809,503. 

